Pro-Russian people celebrate in the central square in Sevastopol, Ukraine, late Sunday, March 16, 2014. Russian flags fluttered above jubilant crowds Sunday after residents in Crimea voted overwhelmingly to secede from Ukraine and join Russia. The United States and Europe condemned the ballot as illegal and destabilizing and were expected to slap sanctions against Russia for it.(AP Photo/Andrew Lubimov)

Pro-Russian people celebrate in the central square in Sevastopol, Ukraine, late Sunday, March 16, 2014. Russian flags fluttered above jubilant crowds Sunday after residents in Crimea voted overwhelmingly to secede from Ukraine and join Russia. The United States and Europe condemned the ballot as illegal and destabilizing and were expected to slap sanctions against Russia for it.(AP Photo/Andrew Lubimov)

In this photo taken on Sunday, March 16, 2014, Pro-Russia demonstrators chant slogans as they carry a giant flag during a rally at a central square in Kharkiv, Ukraine. Thousands of pro-Russia demonstrators gathered in the Ukraine’s northeastern town to show their support for the Crimean referendum. (AP Photo/Sergey Kozlov)

Pro-Russian people celebrate in the central square in Sevastopol, Ukraine, late Sunday, March 16, 2014. Russian flags fluttered above jubilant crowds Sunday after residents in Crimea voted overwhelmingly to secede from Ukraine and join Russia. The United States and Europe condemned the ballot as illegal and destabilizing and were expected to slap sanctions against Russia for it.(AP Photo/Andrew Lubimov)

Self defense volunteers line up outside the Parliament in Kiev, Ukraine, Monday, March 17, 2014. A referendum held in Crimea on Sunday was widely condemned by Western leaders who were planning to discuss economic sanctions to punish Russia on Monday. Ukraine’s new government in Kiev called the referendum a “circus” directed at gunpoint by Moscow.(AP Photo/David Azia)

Pro-Russian people celebrate in the central square in Sevastopol, Ukraine, early Monday, March 17, 2014. Russian flags fluttered above jubilant crowds Sunday after residents in Crimea voted overwhelmingly to secede from Ukraine and join Russia. The United States and Europe condemned the ballot as illegal and destabilizing and were expected to slap sanctions against Russia for it.(AP Photo/Andrew Lubimov)